Dynamical control of matter-wave tunneling in periodic potentials

被引：561

作者：

Lignier, H. ^{[1
]}

Sias, C. ^{[1
]}

Ciampini, D. ^{[1
]}

Singh, Y. ^{[1
]}

Zenesini, A. ^{[1
]}

Morsch, O. ^{[1
]}

Arimondo, E. ^{[1
]}

机构：

[1] Univ Pisa, Dipartimento Fis E Fermi, CNR INFM, I-56127 Pisa, Italy

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.99.220403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on measurements of dynamical suppression of interwell tunneling of a Bose-Einstein condensate (BEC) in a strongly driven optical lattice. The strong driving is a sinusoidal shaking of the lattice corresponding to a time-varying linear potential, and the tunneling is measured by letting the BEC freely expand in the lattice. The measured tunneling rate is reduced and, for certain values of the shaking parameter, completely suppressed. Our results are in excellent agreement with theoretical predictions. Furthermore, we have verified that, in general, the strong shaking does not destroy the phase coherence of the BEC, opening up the possibility of realizing quantum phase transitions by using the shaking strength as the control parameter.

引用

页数：4

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